Born as Claire Farron, or Éclair Farron, she lost her parents when she was 15 years old. Claire takes on her codename of Lightning to become a stronger person to help her younger sister Serah, only to cause tensions between them as a result. In the first game, she is a former Sanctum soldier who sets out to save her sister from the fal'Cie, then strives to save Cocoon from destruction.